An electromagnetic wave strikes a 460 cm2 section of wall
An electromagnetic wave strikes a 4.60 cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 4.20 x 10-4 T. Find how long does it take for the wave to deliver 2850 Joule of energy to the wall?
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an electromagnetic wave strikes a 460 cm2 section of wall perpendicularly the rms value of the waves magnetic field is
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